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authorJan200101 <sentrycraft123@gmail.com>2021-01-15 00:10:49 +0100
committerJan200101 <sentrycraft123@gmail.com>2021-01-15 00:10:49 +0100
commit3814de27892f88d7bee46f434d386ada761fd4ba (patch)
tree0470c6d559ec46201e695664cfaef60ea541f4df /SOURCES/net-packet-fix-overflow-in-tpacket_rcv.patch
parentd6cbdaa78bfe1ecf6aa6a95e743bcba390a2ae93 (diff)
downloadkernel-fsync-3814de27892f88d7bee46f434d386ada761fd4ba.tar.gz
kernel-fsync-3814de27892f88d7bee46f434d386ada761fd4ba.zip
kernel 5.10.6
Diffstat (limited to 'SOURCES/net-packet-fix-overflow-in-tpacket_rcv.patch')
-rw-r--r--SOURCES/net-packet-fix-overflow-in-tpacket_rcv.patch59
1 files changed, 0 insertions, 59 deletions
diff --git a/SOURCES/net-packet-fix-overflow-in-tpacket_rcv.patch b/SOURCES/net-packet-fix-overflow-in-tpacket_rcv.patch
deleted file mode 100644
index 6c6868f..0000000
--- a/SOURCES/net-packet-fix-overflow-in-tpacket_rcv.patch
+++ /dev/null
@@ -1,59 +0,0 @@
-From 00c393ea14d12a4ef490a6aedf0fa6bfc2bfe8c3 Mon Sep 17 00:00:00 2001
-From: Sasha Levin <sashal@kernel.org>
-Date: Thu, 3 Sep 2020 21:05:28 -0700
-Subject: net/packet: fix overflow in tpacket_rcv
-
-From: Or Cohen <orcohen@paloaltonetworks.com>
-
-[ Upstream commit acf69c946233259ab4d64f8869d4037a198c7f06 ]
-
-Using tp_reserve to calculate netoff can overflow as
-tp_reserve is unsigned int and netoff is unsigned short.
-
-This may lead to macoff receving a smaller value then
-sizeof(struct virtio_net_hdr), and if po->has_vnet_hdr
-is set, an out-of-bounds write will occur when
-calling virtio_net_hdr_from_skb.
-
-The bug is fixed by converting netoff to unsigned int
-and checking if it exceeds USHRT_MAX.
-
-This addresses CVE-2020-14386
-
-Fixes: 8913336a7e8d ("packet: add PACKET_RESERVE sockopt")
-Signed-off-by: Or Cohen <orcohen@paloaltonetworks.com>
-Signed-off-by: Eric Dumazet <edumazet@google.com>
-Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-Signed-off-by: Sasha Levin <sashal@kernel.org>
----
- net/packet/af_packet.c | 7 ++++++-
- 1 file changed, 6 insertions(+), 1 deletion(-)
-
-diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c
-index 301f41d4929bd..82f7802983797 100644
---- a/net/packet/af_packet.c
-+++ b/net/packet/af_packet.c
-@@ -2170,7 +2170,8 @@ static int tpacket_rcv(struct sk_buff *skb, struct net_device *dev,
- int skb_len = skb->len;
- unsigned int snaplen, res;
- unsigned long status = TP_STATUS_USER;
-- unsigned short macoff, netoff, hdrlen;
-+ unsigned short macoff, hdrlen;
-+ unsigned int netoff;
- struct sk_buff *copy_skb = NULL;
- struct timespec64 ts;
- __u32 ts_status;
-@@ -2239,6 +2240,10 @@ static int tpacket_rcv(struct sk_buff *skb, struct net_device *dev,
- }
- macoff = netoff - maclen;
- }
-+ if (netoff > USHRT_MAX) {
-+ atomic_inc(&po->tp_drops);
-+ goto drop_n_restore;
-+ }
- if (po->tp_version <= TPACKET_V2) {
- if (macoff + snaplen > po->rx_ring.frame_size) {
- if (po->copy_thresh &&
---
-2.25.1
-